Very premature is a condition in which a baby is delivered between 28 and 31 weeks' gestation. Depending on how premature, how sick, and how lucky or unlucky a baby is, he can get brain problems, cerebral palsy, blindness, deafness, developmental problems, learning disabilities, severe lung diseases, infection and loss of some intestines, etc... Babies who are only moderately premature usually end up fairly normal.
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3

Likely yes:
Unfortunately, a history of regular periods does not mean all of your periods will be right on time. Occasional break through bleeding or mid cycle bleeding can occur. If it just happens occasionally, it doesn't need to be treated unless it bothers you; then a bc pill may be in order.
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4

Irregular periods:
Irregular periods are one of the most common problems obgyns treat. If this is one time problem it usually resolves on its own. If this is a recurring problem you should be evaluated. Infections ; hormonal changes can cause spotting. If concerned for pregnancy then do a home pregnancy test . There are options available to regulate the menstrual cycle. The discharge needs a separate evaluation.
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5

Pregnant?:
Pregnancy must always be considered a possibility. Purchase a home pregnancy test. It becomes positive at about the time you'd be 1 week late. If it's negative, repeat it in 1 week.
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6

It happens sometimes:
Many women have occasional variation of their period's timing, some spotting between periods, a heavier period, a lighter period, a longer or shorter period, or even a missed period. Having one or two of these symptoms doesn’t necessarily mean there is a medical problem, but a visit to one’s primary care or Ob-Gyn doctor is a good idea if symptoms are persistent, recurring, or worrisome.
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8

Probably:
After vigorous sexual inter course, a small amount of bleeding from the vaginal wall or cervix would not be unusual. It is also not unusual to get your period early some months. That being said, if the bleeding occurs each time with intercourse, you must get it checked out with your gyn or family practitioner.
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The menstrual cycle begins with the shedding of the uterine lining, resulting in bleeding from the vagina. A few weeks later, one ovary releases an egg and the uterine lining thickens in preparation for a potential pregnancy. Pregnancy can occur at this stage if sperm fertilizes the egg. If the egg is not fertilized, the egg will leave your body and menstrual bleeding begins again.
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